Profile bio enhancements

[johndoknjas]

Some things that could be nice to have:

• Allow emojis in the standard unicode list. E.g.: https://www.freecodecamp.org/news/all-emojis-emoji-list-for-copy-and-paste/
• Add a button that enables/disables italicized text.

[SergioGlorias]

One note: emojis are heavier than regular text and there may be some abuse

[johndoknjas]

@SergioGlorias True, maybe a limit on the number of emojis that can be used?

[johndoknjas]

Resolved by https://github.com/lichess-org/lila/pull/16469 and commit b490137